hiya hun they are amazing pics and your so lucky to have conceived them naturally too wow !!!
if twins share the same placenta they are identical and are always the same sex, if they have a different placenta then they are non identical and can be different or same sex!
my aunty has not long had identical twins and they shared the same placenta and had a few small problems they are healthy lovely little copper haired girls now though, your beautiful babies have one each so are a lot better off
( they dont want to share already lol)
congrats hunny x x